| r0.c0 | bzk-table_NumberOfRentalHousingUnitsSpecifiedByClassificationEnergyIndexPerMunicipalityHousingDpiTable-y/Number to energy index | bzk-aw-wsw-i:NumberToEnergyIndex | xbrli:nonNegativeIntegerItemType | instant | * | N/A | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c1 | bzk-table_NumberOfRentalHousingUnitsSpecifiedByClassificationEnergyIndexPerMunicipalityHousingDpiTable-y/Energy index smaller or equal to zero point six | bzk-aw-wsw-i:EnergyIndexSmallerOrEqualToZeroPointSix | xbrli:nonNegativeIntegerItemType | instant | * | N/A | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c2 | bzk-table_NumberOfRentalHousingUnitsSpecifiedByClassificationEnergyIndexPerMunicipalityHousingDpiTable-y/Energy index higher than zero point six and smaller or equal to zero point eight | bzk-aw-wsw-i:EnergyIndexHigherThanZeroPointSixAndSmallerOrEqualToZeroPointEight | xbrli:nonNegativeIntegerItemType | instant | * | N/A | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c3 | bzk-table_NumberOfRentalHousingUnitsSpecifiedByClassificationEnergyIndexPerMunicipalityHousingDpiTable-y/Energy index higher than zero point eight and smaller or equal to one point two | bzk-aw-wsw-i:EnergyIndexHigherThanZeroPointEightAndSmallerOrEqualToOnePointTwo | xbrli:nonNegativeIntegerItemType | instant | * | N/A | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c4 | bzk-table_NumberOfRentalHousingUnitsSpecifiedByClassificationEnergyIndexPerMunicipalityHousingDpiTable-y/Energy index higher than one point two and smaller or equal to one point four | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointTwoAndSmallerOrEqualToOnePointFour | xbrli:nonNegativeIntegerItemType | instant | * | N/A | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c5 | bzk-table_NumberOfRentalHousingUnitsSpecifiedByClassificationEnergyIndexPerMunicipalityHousingDpiTable-y/Energy index higher than one point four and smaller or equal to one point eight | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointFourAndSmallerOrEqualToOnePointEight | xbrli:nonNegativeIntegerItemType | instant | * | N/A | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c6 | bzk-table_NumberOfRentalHousingUnitsSpecifiedByClassificationEnergyIndexPerMunicipalityHousingDpiTable-y/Energy index higher than one point eight and smaller or equal to two point one | bzk-aw-wsw-i:EnergyIndexHigherThanOnePointEightAndSmallerOrEqualToTwoPointOne | xbrli:nonNegativeIntegerItemType | instant | * | N/A | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c7 | bzk-table_NumberOfRentalHousingUnitsSpecifiedByClassificationEnergyIndexPerMunicipalityHousingDpiTable-y/Energy index higher than two point one and smaller or equal to two point four | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointOneAndSmallerOrEqualToTwoPointFour | xbrli:nonNegativeIntegerItemType | instant | * | N/A | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c8 | bzk-table_NumberOfRentalHousingUnitsSpecifiedByClassificationEnergyIndexPerMunicipalityHousingDpiTable-y/Energy index higher than two point four and smaller or equal to two point seven | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointFourAndSmallerOrEqualToTwoPointSeven | xbrli:nonNegativeIntegerItemType | instant | * | N/A | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c9 | bzk-table_NumberOfRentalHousingUnitsSpecifiedByClassificationEnergyIndexPerMunicipalityHousingDpiTable-y/Energy index higher than two point seven | bzk-aw-wsw-i:EnergyIndexHigherThanTwoPointSeven | xbrli:nonNegativeIntegerItemType | instant | * | N/A | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c10 | bzk-table_NumberOfRentalHousingUnitsSpecifiedByClassificationEnergyIndexPerMunicipalityHousingDpiTable-y/Energy index unknown | bzk-aw-wsw-i:EnergyIndexUnknown | xbrli:nonNegativeIntegerItemType | instant | * | N/A | $BasisOfPreparationParam | venj-bw2-dm:ConsolidatedMember |
| r0.c11 | bzk-table_NumberOfRentalHousingUnitsSpecifiedByClassificationEnergyIndexPerMunicipalityHousingDpiTable-y/Forecast reporting year | | | | * | $FinancialReportingPeriodCurrentEndDateParam | N/A | N/A |
| r0.c12 | bzk-table_NumberOfRentalHousingUnitsSpecifiedByClassificationEnergyIndexPerMunicipalityHousingDpiTable-y/First forecast year | | | | * | $FinancialReportingPeriodFirstPeriodEndDateParam | N/A | N/A |
| r0.c13 | bzk-table_NumberOfRentalHousingUnitsSpecifiedByClassificationEnergyIndexPerMunicipalityHousingDpiTable-y/Second forecast year | | | | * | $FinancialReportingPeriodSecondPeriodEndDateParam | N/A | N/A |
| r0.c14 | bzk-table_NumberOfRentalHousingUnitsSpecifiedByClassificationEnergyIndexPerMunicipalityHousingDpiTable-y/Third forecast year | | | | * | $FinancialReportingPeriodThirdPeriodEndDateParam | N/A | N/A |
| r0.c15 | bzk-table_NumberOfRentalHousingUnitsSpecifiedByClassificationEnergyIndexPerMunicipalityHousingDpiTable-y/Fourth forecast year | | | | * | $FinancialReportingPeriodFourthPeriodEndDateParam | N/A | N/A |
| r0.c16 | bzk-table_NumberOfRentalHousingUnitsSpecifiedByClassificationEnergyIndexPerMunicipalityHousingDpiTable-y/Fifth forecast year | | | | * | $FinancialReportingPeriodFifthPeriodEndDateParam | N/A | N/A |